.b{
    height:40px;
    width:180px;
    float:left;
    background: rgba(244, 244, 244, 0.87);
    text-align: center;
    font-size: 18px;
}

.b1{
    height:12px;
}

.b11{
    height:35px;
}

.b2{
    width:1100px;
    height:80px;
    text-align: center;
    color:#000000;
}

.b3{
    height:60px;
    width:200px;
    text-align: center;
    font-size: 30px;
    color: #ffffff;
}

.b4{
    width:50px;

}

.b5{
    width:1000px;
    height:300px;
    color: #303030;
    font-size: 20px;
}